多TMD控制下超高层建筑风振响应的快速算法及其应用

基于谐波激励法,提出一种适合大型复杂结构多调谐质量阻尼器(MTMD)风振控制的快速算法,该算法可根据刚性模型风洞试验获取的风荷载时程数据计算结构在MTMD作用下的风致响应.以高度为439 m的深圳京基金融中心(KFT)的风振控制为例,计算了单调谐质量阻尼器(STMD)作用下的结构风致响应,分析了STMD固有频率、阻尼比及质量等参数对结构风致响应的影响,进而对不同形式MTMD的结果进行对比分析.研究表明:采用快速算法进行风振控制计算是正确有效的;安装在顶层的STMD可有效控制KFT的风振响应;在TMD总质量相同的条件下,采用MTMD较STMD对结构的控制效果有所减弱,但MTMD方式仍可使结构顶部的峰值加速度响应降低约30%.

Rapid Algorithm and Its Application of Wind-Induced Vibration Response of Super High-Rise Building Under the Control of Multiple Tuned Mass Dampers

Proposed in this paper is a rapid algorithm based on the harmonic excitation method,which is used to calculate the wind-induced vibration(WIV) of large-scale complex structures under the control of multiple tuned mass dampers(MTMD) according to the time-historic wind loads obtained in the rigid-model wind tunnel test.Then,by taking the Shenzhen Kingkey Finance Tower(KFT) with a height of 439 m as a research objective,the WIV response of KFT under the control of single tuned mass damper(STMD) is analyzed,and the effects of MTMD configuration as well as the natural frequency,damping ratio and mass of STMD on the WIV response are compared and discussed.The results show that(1) the proposed rapid algorithm is accurate and effective in calculating the WIV;(2) a STMD installed at the top floor can effectively mitigate the WIV of KFT;and(3) though STMD is more effective than MTMD with the same total TMD mass,MTMD can still reduce the peak acceleration of WIV response at the top of the building by about 30%.